diff options
| author | Katze Miau <miaukatzemiau@priveasy.de> | 2011-12-06 15:57:38 (GMT) |
|---|---|---|
| committer | Katze Miau <miaukatzemiau@priveasy.de> | 2011-12-06 15:57:38 (GMT) |
| commit | a4fa439241252bb25559952aeffbffd7f6d9721f (patch) | |
| tree | 3dabbf48092244dac75c5f64138b57678fa64651 /doc/overview.org | |
| parent | a4487afd8a7a2121217de9c1939d783164498a0c (diff) | |
add FSM update
FSM to handle firmware update process in a synchronized all-or-nothing
manner. See doc/overview.org for details.
Diffstat (limited to 'doc/overview.org')
| -rw-r--r-- | doc/overview.org | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/doc/overview.org b/doc/overview.org index 019638d..78bf230 100644 --- a/doc/overview.org +++ b/doc/overview.org @@ -24,7 +24,7 @@ * State machines (FSMs) State machines are implemented using the /sbin/fsm script (see below). -** Network +** inetable Controls the different network states that result of the local availability of internet connection and the state of the cloud. @@ -65,13 +65,13 @@ digraph dsd { - all internet traffic is redirected to a local httpd, yelling the network status and explaining FFJ -** Update +** update Implements all-or-nothing update of nodes (e.g. if the network protocol changes incompatibly). Synchronized via p2ptable firmware-versions with the fields - machine_id - - current firmware (sha256) - - target firmware (sha256); empty if no update shall be performed + - current firmware (some human readable version string) + - SHA256 of target firmware; empty if no update shall be performed - time target: set by admin to time when update shall happen - acknowledge time: set by device to time target once ready for an upgrade @@ -81,9 +81,9 @@ digraph dsd { #+begin_dot FSM_Update.png -Tpng digraph { - Idle -> Ready; - Ready ->{ Scheduled; Idle }; - Scheduled ->{Applying; Idle }; + Idle -> Ready; + Ready ->{Idle; Scheduled} + Scheduled ->{Idle; Scheduled; Applying} } #+end_dot *** Idle @@ -98,8 +98,8 @@ digraph { conditions hold: 1. target firmware, update time target and acknowledge update time are empty - 2. current time > time target == acknowledge time; And target - firmware points to a new version that is locally stored an + 2. time target == acknowledge time; And target + firmware points to a new version that is locally stored and verified Once this state is reached the update is performed. @@ -120,7 +120,7 @@ digraph { responds, we are online - returns connectivity status - TODO: ping multiple hosts in parallel -** Finite state machine +** Finite state machines FSMs are implemented using - /sbin/fsm :: a script to monitor and change the state: - fsm watch <name> :: check whether a state change shall occur |